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Preparation of the sea water reference material for trace metals, NASS-1

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Abstract

The preparation of a sea water reference material, NASS-1, is described. The sea water is an open ocean sample, salinity 35.07‰, gathered at the 1300 metre level in the North Atlantic, south-east of Bermuda. It is acidified to pH 1.6 with nitric acid and bottled in 2 1 polyethylene bottles. Reliable values are available for 11 trace metals (As, Cd, Cr, Co, Cu, Fe, Pb, Mn, Mo, Ni and Zn). The results of a long-term sea water storage experiment are also described.

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